Stonecoil Serpent, X
Reach, trample, protection from multicolored
When Stonecoil Serpent enters the battlefield, put X +1/+1 counters on it.
It is protected against Dack, Teferi and Assassin Trophy.
Is it good enough for Shop ? I don't think so, but it is worse considering.
Mystical Dispute 2U
This spell costs 2 less to cast if it targets a blue spell.
Counter target spell unless its controller pays 3.
It is less powerful that Red Elemental Blast to fight blue, but it is not completely dead against the rest. It is also mono Blue. It dodges misstep even if it is less important now.
Can this see some play ? in BUG maybe ?
There is an article explaining the new mechanics: